Tubular anchorage boot for structural columns



Dec. 18, 1934. I H oss 1,984,753

TUBULAR ANCHORAGE BOOT FOR STRUCTURAL COLUMNS Filed NOV. 14, 1929 INVENTOR ATTORNEYS Patented Dec.18, 1934 I 1,984,753

; UNITED STATES PATENT OFFICE" TUBULAR ANCHORAGE Boo'r FOR STRUCTURAL COLUMNS Herbert B. Moss, Brooklyn, N. Y., assignor to The Linde Air Products Company, a corporation of Ohio Application November 14,1929, Serial No. 407,244

1 Claims. (Cl. 72-72) My invention relates to anchorage boots for greatest distance from the common geometrical structural columns and more particularly to a center of the cross section of the column. boot comprising tubular members welded to the Another object ofmy invention is to weld an foot of the, column for receiving anchor bolts. anchorage boot to the foot of a column so that .15 The foot of a structural column is usually prothe forces tending to overturn the column .will 5 vided with some form of an anchorage boot to beptransmitted to the anchorage bolts along a which members, such as anchor bolts, are seline substantially parallel and adjacent to the cured to hold the column in an upright position line of weld metal joiningv the boot and the on its foundation. 7 column. I

10 Anchorage boots heretofore havecomprised an Another object of my invention is to construct 10 arrangement of structural steel shapes, such asv an anchorage boot that can be successfully apangles, tees, and channels, and one or more steel plied to a column in the field. plates; and these steel shapes have been either 'These and other objects of the invention will riveted or welded to each other and to thefoot be more fully understood from the following jectionable because they require a number of companyingdrawing in which, parts, and must be accordingly laid out, cut, and Fig. I is an elevational .view of the foot of a fitted to each other and to the column. Further, column with a boot attached to the column and in the riveted construction a considerable secured to a foundation;

2o amount of labor is required for accurately locat- Fig. II is a cross section of the boot and the ing and punching the rivet holes; while in the column on line IIII of Fig. I; welded construction the amount of welding re- Fig. III is an elevational view of a boot welded quired is relatively high. Boots of this charat the top and bottom to the foot of a column acter also are objectionable because they are and also disclosing a clamp for holding the '25 easily damaged in transit and in erection. tubular members in place while they are being According to my invention, the foregoing and welded; other objections are avoided by providinga one Fig. IV is an end view of the boot and clamp piece tubular'boot memberfor each anchor bolt shown in Fig. III; which is welded to a side of'the foot of the col- Figs. V to VII are enlarged sections of differumn. Where a flanged column is used, the ent forms of boot members.

member is preferably welded to the edge of the Various forms of structural columns may be flange, provided with anchorage boots of my invention. As a result of reducing the number of parts, For the purpose of illustrating my invention, a. and due to the simplified construction of my flan column 1 is shown having a boot 2 atboot, an economical and strong boot is obtained tached thereto comprising a tubular member 3 35 per unit of weight. I welded to each flange 4 of the column along its One of the objects of my invention therefore, edge 5- e lower ends of the tubular members is to provide a structural column with an an- 3 are set back from the base end of the column chorage boot rigidly secured to it. I to prevent it from contacting with the base plate 40 Another object of my invention is to construct 6 p W ch e foot of the column rests. 40 an anchorage boot that will provide a positive The tubular membe1'53 are Secured the means for e uringthe column found a foundation by means of rods anchored in the tions which have been designed on'the assumpfoundation and secured to the members- The men of fixed end conditions. anchoring means herein shown comprise an- 5 Another Object of my invention is to construct chor bolts 7 anchored in a foundation 8 and exan anchorage boot by means of welding wherein tendmg upwardly through the metal plate 6 and the application of welding thereto is facilitated ggg zg g g gg ggfi fiz fi g ig i gg by the design thereof to obtain thorough peneagainst the top of the tubular member by a tration of h Weld metal into the base metal nut 10 cooperating with the threads on the end about the jomt formed by my design. of each anchor t Another Obj ct of y ihVentiOn is to construct In Fig. I the tubular members 3 are welded an anch r e b Comprising p ty Of throughout their length to the column flanges. tubular members welded to the foot of the col- Sometimes in such a long seam of weld metal,

umn parallel to its longitudinal axis and at the stresses are set up in the metal due to the 55 of the column. Boots of this character are obdescription of my invention disclosed in the ac- 15 v contraction of the metal upon cooling. To reduce or avoid these stresses and also to decrease the cost of welding, the tubular members may be welded to the flanges 4 at the top and bottom of the tubular boot members 3 leaving a gap between the seams of weld metal 11 at the middle of the members as is shown in Fig. III.

To facilitate the welding of the boot members 3 to the flanges 4 of the structural column 1, one or more clamps 12 may be used to hold the boot members in place while they are welded to the edges of the flanges 4. The clamp shown in Figs. III and IV comprise two U shaped members 13 provided with sockets 14 in each of the inside corners to receive the boot members. The end of the U members are coupled together by bolts 16 passing through the flanges 17 on the ends of the members 13. The clamp 12 is slipped over the end of the column 1 and the boot members 3 are inserted in the sockets 14 and clamped against the column flanges 4 by tightening the nuts on the.

bolts 17.

Where thick-walled pipe is used for the boot members, a groove 18 may be milled in the outer surface of the pipe, lengthwise thereof, to receive the edge of the flange l of the column, as shown in Fig. V. The groove 18 insures the proper alignment of the pipe with the edge of the flange 4 while the weld metal 11 is deposited on each side of the flange.

The tubular boot members 3 may also be made of cast metal, preferably cast steel, in which the groove 18 of the proper dimensions to flt the edge of the column'flange 4 is cast in the member. A member 3 of this form is shown in Fig. VI welded to the flange 4 of a column by the Weld metal 11 deposited on each side'of the flange.

Another modification of a boot member is shown in Fig. VII in which the boot member 3 is made of sheet metal bent in a tubular form over a mandrel leaving an open side in the member provided with flanges 19 which are welded to each side of the flanges t on the column.

While I have shown the preferred forms of my invention, changes in the details shown may be made without departing from the scope of my invention as defined in the appended claims.

I claim as my invention:

1. In combination, a structural steel shape having a flange, and a metal tube having its axis parallel to said flange and its wall welded to said flange.

2. In combination, a structural steel shape having flanges, and metal tubes having their axes parallel to said flanges, one tube being welded to each flange.

3. In combination, a structural steel shape having parallel flanges, and metal tubes having their axes parallel to said flanges, each flange having a tube welded thereto near one end of the flange.

4. In combination, a structural steel column having parallel vertical flanges, and metal tubes having their axes parallel to said flanges and severally welded to the flanges adjacent the foot of the column.

5. In combination, a structural steel column having parallel vertical flanges, said flanges having their outer edges located at the maximum distance on the column from the center of gravity of the cross-section of said column, and metal tubes having their axes parallel to said edges and severally welded thereto.

6. An anchorage boot for-a column comprising a tubular member extending in a lengthwise direction for a substantial distance along said column and disposed adjacent the foot thereof; and longitudinal lines of weld metal extending between said member and said column to secure the member to said column.

7. An anchorage boot for a flanged column comprising at least one metal tube welded to the edge of a flange of the column in a lengthwise direction thereof, said tube having the bore thereof spaced from the edge of said flange by a distance comprising substantially the thickness of the wall of said tube and any inter.- posed weld metal.

8. An anchorage boot for a column having a plurality of flanges, said boot comprising a plurality of tubular members each having a groove therein for receiving an edge of one of said flanges; and longitudinal lines of weld metal deposited along the line of contact between the edges of said grooves and said flanges.

HERBERT I-I. MOSS. 

